The Effectiveness of Diode Laser 805 nm Hair Removal in Groups of Various Ethnicity

Abstract

According to the scientific publications, laser hair removal is considered to be the most effective method of permanent hair reduction. So far, no effectiveness comparison of a different ethnicity groups in regards to pubic laser hair removal was made. The aim of the study is to show the subjective and objective effectiveness and side effects of diode (805 nm) laser hair removal in pubic area in groups of various ethnicity. The study was conducted in UK and Poland on the group of 205, 20-40 years old patients qualified for the course of 6 treatments after the initial interview and patch test. Ethnicity was defined by questionnaire in accordance with Census 2001. 111 of 205 participants were divided into the 4 groups: White 29 participants: people with white skin, Black 22 participants: people with black skin, Asian 28 participants: people from Asia, Mix Raced 32 participants: people whose ancestors had both: White, Black or Asian skin. Effectiveness was analysed in the area of 1 cm2 of the treated skin as the percentage of hair reduction. Objective effectiveness analysis in groups: 92.5% for Asians, 81.5% for participants with Black skin, 86.9% for Mix raced participants and 88.2% for White skin participants was different to the subjective analysis: 88.9% for Asians, 78.0% for Black skin participants, 84.4% for Mixed Raced participants and 82.3% for White skin participants. Side effects were correlated with ethnicity (p = 0.001). The highest percentage of complications occurred in the group of Black skin 81,82% and Mixed Raced 81.25% participants. The best results in the studied area were observed objectively and subjectively in a group of Asian participants. The subjective assessment of the hair reduction effectiveness was significantly lower than the objective assessment of the percentage of hair reduction in each of the studied ethnic groups.

Diode laser in the management of faun tail nevi

“…Phototypes I-III require a broader choice of densities with a shorter length of the pulse, while the darker skin types (phototypes IV-VI) need lower densities and a longer duration of the laser pulse [7]. After the procedure, redness, burns, and pigmented lesions may be observed [8]. Both our patients had redness following each sitting and experienced a good cosmetic improvement after four sittings of triplewavelength diode laser therapy (Figs.…”

Assessment of visual analogue scale (VAS) in patients undergoing elective hair reduction with diode laser

“…Similarly, in a study over 8 patients, approximate decrease in hair growth was from 75%-90% [7] . In a study conducted over people of various ethnicity, per cm2 reduction of hair was noticed, 92.5% for Asians, 81.5% for people with black skin,86.9% for mixed race and 88.2% for people of white coloured skin [8] . Zhou et al calculated hair density by drawing a circle of 3.5mm and calculating the hairs within the circle.…”

Comparison of efficacy of diode laser in patients of facial hirsutism with normal dehydroepiandrosterone sulfate and dihydrotestosterone versus deranged dehydroepiandrosterone sulfate and dihydrotestosterone level—A longitudinal study

“…The satisfaction level of patient was assessed according to the 5‐grade scale as: 1–treatment has not met any of my expectations; 2–lack of satisfaction from the treatment effect; 3–moderate satisfaction; 4–meant satisfactory effect; 5–the treatment met all my expectations 3 …”

“…Laser hair removal is considered to be the most effective method of permanent hair reduction. Currently, used devices perform selective photo‐thermal destruction of the hair follicles, based on the principle of selective photothermolysis 3 . Diode lasers are preferred for hair removal due to its deep penetration and its target being the hair follicle 4 .…”